Oil burning furnace for tobacco barns



Oct. 14, 1941. AR 2,259,201

OIL BURNING FURNACE FOR TOBACCO BARNS Filed Nov. 2'7, 1939 3 Sheets-Shee t 1 s N Q l l b 1; m N

m L Q g Gary A iiorneys Inventor Oct. 14, 1941.- J. P. CAREY 2,259,201

OIL BURNING FURNACE FOR TOBACCO BARNS Fi led Nov. 27, 1959 s Sheets-Sheet 2 lo l I l o f 7I as o Q \F 1 Q I In [3] i 1 :Z\- 4 i; W N" e7 37 w W 23 32 36 5 Inventor 1/ P Car (9 A ilomey;

J. P. CAREY I i 2,259,201

OIL BURNING FURNACE FOR TOBACCO BARNS Filed Nov. 27, 1939 t 3 Sheets-Sheet 3 A iiomeys In venior l atented Oct. 14, 1941 h Jack Perry Carey, Kinston, N. C.

Application November 27, 1939, SeriallNo. 306,379

" 4 Claims. (Cl. 158 -4) The present invention relates to oil burning fu-rnacesand has particular reference to an apparatus of this character designed for usein tobacco barns for supplying heated air to the barn to be used in the curing of the tobacco storedtherein. l

An important object of the present invention is to provide a burner construction adapted for mounting in position in the conventional type of wood burning furnaces such as heretofore used in tobacco barns and which includes a battery of oil burner elements having means for controlling thedraft of air fedto the burners to promote the proper efficiency in combustion of the fuel. 7

A further object is to provide an apparatus of this character of simple and practical constructionywhich is eflicient and reliable in per-form'- an'ce, relatively inexpensive to manufacture and install in operative position and otherwise well adapted for the purposes for which the same is intended.

Other advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to .the accompanying drawings'forming part-hereof,

whereinlike numerals refer to like parts throughout and in which: t

Figure 1 is an elevational View of the fuel supply system showingthe furnace in section.

Figure 2 is a fragmentary longitudinal sectional View of the front end of the furnace.

Figure 3 is a top plan view of the burner mounting base.

Figure 4 is a longitudinal sectional View therethrough.

Figure 5 is a top plan view of one of the burners.

Figures 6, 7 and 8 are sectional views taken respectively on the lines 6-6, and 8-8 of Figure 5.

Figure 9 is a perspective View of one of the draft slides and Figure 10 is a top plan View of one of the draft bafiles.

Referring now to the drawings in detail the numeral 5 designates the furnace generally which is constructed of fire brick, the front end of the furnace being closed by a metal plate 6 having a draft control plate I mounted therein. The rear portion of the furnace leads to the conventional fines (not shown), usually provided for conveying the heated air and gases throughout the barn.

In the bottom portion of the furnace is supported the metal burner mounting base 8 which is supported above the ground level to provide an air chambers beneath the same, having a hinged door 9 the base being-shown in details in Figures 3 and 4 and is constructed of sheetmetal having apair of circular op'enings I8 formed therein and over which-are secured the burners designated generally at H;

The burners are of open tr-ay construction, preferably of cast ironand include a square shaped base IZ for' attaching to the mounting base 8,-and from which risesanouter. circular burner wall l3; an intermediate circular burner wall: l4 and an inner circular burner wall [5, said walls being concentrically arranged.

At the center of'the burner is a threaded opening it for attaching an oil feed pipe l'l thereto. 1 Between thewall's l3 and |4 isformed the outer oil tray or pan I8 while between the walls I4 and i5 is formed the'intermediate oil tray or pan l9 and inwardly of the wall I i-is formed the inner oil tray or pan 2!] which communicates directly with the opening I6 for supplying oil thereto.

- At' diametrically opposite sides of the tray 20 "is formed a pair of air vents 21 which extend throughthe base 12, the tray 20 being separated from the openings by upstanding walls 22 which rise above the walls i5. At diametrically opposite sides of the. walls [5 are formed overflow ports 2 3which are below the upper edges of the wall 22 whereby toLpermit oil from the tray 2!! to enter the tray I9.

At spaced intervals the tray i8 is formed with a plurality of vent openings 24 likewise extending through the base l2, each of the vent openings having upstanding walls 25 which terminate below the upper edges of the walls l3 and [4. The walls 25 for the vent openings 24 thus separate the tray I8 into a plurality of oil trays into which the oil is adapted to be fed through over flow notches 26 in the wall l4.

Secured to the underside of the mounting base 8 is a longitudinally extending guide 2'! within which are slidably mounted draft slides 28 and 29 for the respective openings l0 over which each of the burners are mounted.

Each of the slides comprise a flat plate as illustrated in Fig. 9 of the drawings and provided at its inner edge with a longitudinally extending slotted opening 30 to accommodate the oil pipe ll, while the front edge of the slide is provided with a forwardly extending operating bar 3! having a downturned front end 32 to provide a convenient hand grip.

Also secured to the underside of the mounting base 8 are a plurality of baflles designated at 33,

34 and 35', each of the bafiles including a downwardly and forwardly curved wall 36 and side walls 31 to provide a forward open end for the bafile, the curved wall 36 serving as a deflector for directing the air entering the chamber 9 upwardly through the vent openings in the burner. Attaching flanges 38 are provided at the upper edge of each bafile for securing the same to the underside of th mounting base 8. The baflies are of a successively increased size toward the rear of the mounting base so that the forwardly positioned baffles will not obstruct air from entering the rearwardly disposed bafiles.

inner pan, an intermediate pan" and an outer pan, said inner and outer pans having the vents extending therethrough, an oil feed pipe communicating with the inner pan, overflow notches in the upper edges of the walls, except the outermost wall, to feed oil to said pans and slides carried by the base for controlling passage of air through the vents.

2. An oil burner for furnaces comprising a mounting base above the bottom of the furnace to provid an air chamber beneath the base, said phere, an oil tray supported on the base and In th present embodiment of the invention a battery of two burners H is provided and the foremost burner is provided with a pair of the baffles 33 and 34, each baflie supplying air to a' The .whichserves to confine the gases from the oil fed to the burners for proper combustion before th same enters the furnace 5.

The fuel is supplied by gravity by one or more tanks 40 mounted on a suitable stand 4| and from the tank a feed pipe 42 extends to acontrol chamber 43 to which the oil pipes I! are connected. The controlchamber 43 is provided with valves 44 forrcontrolling the supply of fuel fed to the respective oil pipes I1.

,It is believed the details of construction, advantages and manner of operation of the burner will be readily understood from the foregoing without further detailed explanation.

What is claimed is:

1. An oil burner for furnaces comprising a mounting base above the bottom of the furnace to provide an air chamber beneath the base, said chamber having communication with the atmosphere, an oil tray supported on the base and having air vents communicating with the chamber, each of the air vents having upstanding edges, said tray including a plurality of upstanding concentrically spaced walls defining a plurality of concentric oil pans and including an having air vents communicating with the chamber, a slide carried by the base for controlling passage of air through the vents and baflles suspended in a row beneath the base, each of said baffles projecting downwardly below its adjacent forwardly disposed baflle for deflecting air entering the chamber into the vents.

3. An oil burning furnace comprising a shell for the furnace, a horizontal mounting bas above .the bottom of the shell to provide an air chamber beneath the base, said chamber having communication with the atmosphere, and said base having a plurality of openings therein providing communication between the chamber and the interior of the shell above the base, a burner tray secured in position over each opening, an oil feed pipe connected to each tray, air vents in each tray, means for controlling air passing through the vents and baflies for each tray having a forwardly projecting wall for deflecting air entering the chamber toward the openings of the base.

4. An oil burning furnac comprising a furnace shell having a horizontal metallic plate separating the furnace into upper and lower chambers, said lower chamber having communication with the atmosphere, said plate having openings therein, cylindrical walls rising from said openings and defining a series of combustion chambers communicating with the upper chamber of the furnace, a burner in the bottom of each combustion chamber and covering the opening associatved therewith, said burners having vent openings 

